The Full Form of ITIL is‍ Information Technology Infrastructure Library.

ITIL is a framework of best practices for delivering IT services. ITIL’s systematic approach to IT service management can help businesses manage risk, strengthen customer relations, establish cost-effective practices, and build a stable IT environment that allows for growth, scale and change.

The IT Infrastructure Library (ITIL) is a library of volumes describing a framework of best practices for delivering IT services. ITIL has gone through several revisions in its history and currently comprises five books, each covering various processes and stages of the IT service lifecycle. ITIL’s systematic approach to IT service management can help businesses manage risk, strengthen customer relations, establish cost-effective practices, and build a stable IT environment that allows for growth, scale and change.

Developed by the British government’s Central Computer and Telecommunications Agency (CCTA) during the 1980s, the ITIL first consisted of more than 30 books, developed and released over time, that codified best practices in information technology accumulated from many sources (including vendors’ best practices) around the world. IBM, for example, says that its four-volume series on systems-management concepts, A Management System for Information Systems, known as the Yellow Books, provided vital input into the original ITIL books.